package com.bgy.config.jwt;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.BeanIds;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsUtils;

@SuppressWarnings("SpringJavaAutowiringInspection")
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder)
            throws Exception {
        authenticationManagerBuilder.userDetailsService(this.userDetailsService).passwordEncoder(
                passwordEncoder());
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthenticationTokenFilter authenticationTokenFilterBean() throws Exception {
        return new JwtAuthenticationTokenFilter();
    }

    @Bean(name = BeanIds.AUTHENTICATION_MANAGER)
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {

        httpSecurity.headers().frameOptions().disable();

        httpSecurity
                // 由于使用的是JWT，我们这里不需要csrf
                .csrf()
                .disable()

                .exceptionHandling()
                .authenticationEntryPoint(unauthorizedHandler)
                .and()

                // 基于token，所以不需要session
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()

                .authorizeRequests()
                // .antMatchers(HttpMethod.OPTIONS, "/**").permitAll()

                // 允许对于网站静态资源的无授权访问
                .antMatchers(HttpMethod.GET, "/", "/*.html", "/favicon.ico", "/**/*.html", "/data/**",
                        "/lib/**", "/**/*.css", "/static/**", "/files/**", "/**/*.js", "/downloadCenters/**")
                .permitAll()
                // 对于获取token的rest api要允许匿名访问
                .antMatchers("/tokens/**", "/project/**")
                .permitAll()
                // 对于druid开放
                .antMatchers("/druid/**")
                .permitAll()

                .antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources",
                        "/configuration/security", "/swagger-ui.html", "/webjars/**",
                        "/swagger-resources/configuration/ui", "c").permitAll()
                .requestMatchers(CorsUtils::isPreFlightRequest).permitAll()

                // 除上面外的所有请求全部需要鉴权认证
                //.anyRequest().authenticated();
                .anyRequest().permitAll();

        // 添加JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilterBean(),
                UsernamePasswordAuthenticationFilter.class);

        // 禁用缓存
        httpSecurity.headers().cacheControl();
    }
}
